[PATCH] D109112: [darwin/x86] Model cxx_fast_tlscc as not preserving r11

[Nico Weber via Phabricator via llvm-commits]

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rjmccall, do you have any opinion on what (if anything) should happen here? At the moment, using TLV across dylibs on darwin is basically broken (see https://github.com/llvm/llvm-project/issues/51045).

This is a fairly simple fix. It carries some risk, but maybe not having it is worse?


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